One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,8)(5,6)(9,10,13,11)(12,15,16,14)(20,27)(24,28)(26,31)(29,32)(2,6)(3,8)(10,11)(14,15)(17,18)(19,21)(20,28)(22,23)(24,27)(25,30)(26,32)(29,31) involution — undirected(1,3)(2,4)(5,8)(6,7)(9,11,13,10)(12,15,16,14)(18,23)(19,25)(24,28)(26,31)(1,4)(2,3)(5,7)(6,8)(9,12)(10,14)(11,15)(13,16)(17,19,22,25)(18,21,23,30)(20,26,27,31)(24,29,28,32)(1,2)(3,4)(5,6)(7,8)(17,20,22,27)(18,24,23,28)(19,26,25,31)(21,29,30,32)(1,4)(2,3)(5,7)(6,8)(17,21)(18,25)(19,23)(20,29)(22,30)(24,31)(26,28)(27,32) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.